package com.example.jbservice.aspect;


import com.example.jbservice.Constant.AutoFillConstant;
import com.example.jbservice.annotation.AutoFill;
import com.example.jbservice.enumeration.OperationType;
import com.sun.prism.impl.BaseContext;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 自定义切面 实现公共字段自动填充
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect
{
    /**
     * 切入点
     */
    // execution *所有的返回值，    mapper 下所有的类 所有的方法 .. 匹配所有参数类型 同时被 AutoFill 注解的
    @Pointcut("execution(* com.example.jbservice.Mapper.*.*(..)) && @annotation(com.example.jbservice.annotation.AutoFill)")
    public void autoFillPointCut(){

    }

    /**
     * 前置通知 为公共字段赋值
     */
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("开始进行公共字段自动填充。。。");

        //获取当前被拦截的数据库操作
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType = autoFill.value();
        //获取当前被拦截的方法的参数--实体对象
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }
        Object entity = args[0];
        log.info("赋值的数据:{}", entity);
        //准备赋值的数据
        //Object entity = args[0];
        LocalDateTime now = LocalDateTime.now();
       // Long currentId = BaseContext.getCurrentId();

        //根据当前不同的操作类型 为对应的属性通过反射来赋值
        if (operationType == OperationType.INSERT) {
            try {

                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
               // Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
             //   Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
              //  Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                //通过反射为对象属性赋值
                setCreateTime.invoke(entity, now);
               // setCreateUser.invoke(entity, currentId);
              //  setUpdateTime.invoke(entity, now);
               // setUpdateUser.invoke(entity, currentId);
            } catch (NoSuchMethodException e) {
                throw new RuntimeException(e);
            } catch (InvocationTargetException e) {
                throw new RuntimeException(e);
            } catch (IllegalAccessException e) {
                throw new RuntimeException(e);
            }

        } else if (operationType == OperationType.UPDATE) {
            try {
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
               // Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity, now);
               // setUpdateUser.invoke(entity, currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }


        }
    }
}
